#103A5B#103A5B

#103A5B is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.8% C 0.074 H 246.4°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#103A5B
RGB	rgb(16, 58, 91)
HSL	hsl(206, 70%, 21%)
HSV	hsv(206, 82%, 36%)
CMYK	cmyk(82.4%, 36.3%, 0%, 64.3%)
CIE-LAB	lab(23.31, -1.30, -23.81)
CIE-LCH	lch(23.31, 23.85, 266.89°)
OKLab	oklab(33.78% -0.0295 -0.0677)
OKLCH	oklch(33.78% 0.074 246.4)
XYZ	xyz(3.6143, 3.8912, 10.4561)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#103A5B #5B3110

analogous

#105B56 #103A5B #10145B

triadic

#103A5B #5B103A #3A5B10

tetradic

#103A5B #56105B #5B3110 #145B10

square

#103A5B #56105B #5B3110 #145B10

split-complementary

#103A5B #5B1014 #5B5610

monochromatic

#05111A #071927 #103A5B #195B8F #227CC3

Accessibility & contrast

On white

11.81

#103A5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#103A5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #103A5B

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##103A5B	#FFFFFF	#000000	##FFFFFF
##103A5B	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3B5C

Deuteranopia (green-blind)

#20345A

Tritanopia (blue-blind)

#004246

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #103a5b;
/* rgb */ color: rgb(16, 58, 91);
/* oklch */ color: oklch(33.8% 0.074 246.4);

Tailwind

colors: {
  custom: {
    50: '#5b6f89',
    500: '#103a5b',
    950: '#000000',
  },
}

SCSS

$custom: #103a5b;
$custom-light: #5b6f89;
$custom-dark: #000000;

JSON

{
  "hex": "#103a5b",
  "rgb": {
    "r": 16,
    "g": 58,
    "b": 91
  },
  "hsl": {
    "h": 206.4,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.33776,
    "c": 0.07383,
    "h": 246.4
  },
  "luminance": 0.03892
}

Semantic roles & 50–950 ramp

primary

#103A5B

secondary

#945E33

accent

#893BED

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070B

muted

#797A7C

Preview Lab

Preview with #103A5B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →